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0303 <br />Sample bottles were provided by the lab and were part of the quality control program. <br />All samples were handled and preserved in accordance with the requirements of the laboratory <br />used for that analysis. Calibration and operation of all monitoring equipment followed the <br />instrument manufacturer's instructions. <br />CHAIN OF CUSTODY <br />All samples were handled in accordance with standard laboratory chain of custody <br />protocol after collection and identification. <br />